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Zebra mempool.

A zebrad application component that manages the active collection, reception, gossip, verification, in-memory storage, eviction, and rejection of unmined Zcash transactions (those that have not been confirmed in a mined block on the blockchain).

Major parts of the mempool include:

  • Mempool Service
    • activates when the syncer is near the chain tip
    • spawns download and verify tasks for each crawled or gossiped transaction
    • handles in-memory storage of unmined transactions
  • Crawler
    • runs in the background to periodically poll peers for fresh unmined transactions
  • Queue Checker
    • runs in the background, polling the mempool to store newly verified transactions
  • Transaction Gossip Task
    • runs in the background and gossips newly added mempool transactions to peers

Re-exports

pub use crate::BoxError;
pub use config::Config;

Modules

User-configurable mempool parameters.
crawler 🔒
Zebra Mempool crawler.
Transaction downloader and verifier.
error 🔒
Errors that can occur when interacting with the mempool.
A task that gossips any zebra_chain::transaction::UnminedTxId that enters the mempool to peers.
Zebra Mempool queue checker.
storage 🔒
Mempool transaction storage.

Structs

The mempool transaction crawler.
Mempool async management and query service.
The mempool queue checker.

Enums

The state of the mempool.
Transactions rejected based on transaction authorizing data (scripts, proofs, signatures), These rejections are only valid for the current tip.
Mempool errors.
Transactions rejected based only on their effects (spends, outputs, transaction header). These rejections are valid while the current chain continues to grow.
Transactions rejected based only on their effects (spends, outputs, transaction header). These rejections are only valid for the current tip.

Type Definitions

Outbound 🔒
State 🔒
TxVerifier 🔒